1.
1 Steel Pipe: Scaffold steel pipes should use diameter 48.
3 × 3.
6 steel pipes.
The maximum mass of each steel pipe should not exceed 25.
kg.
.
Since the Ming Dynasty, the construction of this busy section of Wuhan has been encircled, and the traffic police have issued detour
Villagers who have just returned to Wugang, look, this road is closed for construction and can’t pass today!
